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Dan Black is control systems engineer at Techni-Systems LLC, Chelan, Wash., a supplier of computer-based industrial refrigeration control systems. For more information, call (509) 682-2239, visit www.techni-systems.com or e-mail dan@techni-systems.com.
Techniques such as variable-speed control, duty cycling, demand refrigeration, intelligent engine room control, load shedding and demand limiting are easy to implement with a computerized control system.